On 2/27/08 at 4:24 AM, Kevin.McCann at umbc.edu (Kevin J. McCann) wrote:
>I have some 3d data {{x1,y1,z1},{x2,y2,z2},...} and I would like to
>set the z-values to zero if they fall below zero. More generally, I
>would like to set z to a threshold value if it is at or below a
>threshold. This seems as though it should be an easy enough thing to
>do, but the only way I have figured out is to parse out the
>z-vector, do
>mask=((#<thresh&) /@ zdata)/.True->0/.False->1;
>then zvector = zvector*mask;
>and rebuild the {x,y,z} data.
Using the built in function Clip is undoubtedly faster.
Clip[zvector,{0, Infinity}]
will return the values you want.
--
To reply via email subtract one hundred and four